com.linkedin.pinot.common.utils.DataTableJavaSerDe.java Source code

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Here is the source code for com.linkedin.pinot.common.utils.DataTableJavaSerDe.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.linkedin.pinot.common.utils;

import com.linkedin.pinot.common.Utils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import javax.annotation.Nonnull;
import org.apache.commons.compress.utils.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Java serialization/de-serialization based DataTableSerDe implementation.
 */
public class DataTableJavaSerDe implements DataTableSerDe {
    private static final Logger LOGGER = LoggerFactory.getLogger(DataTableJavaSerDe.class);

    /**
     * @param object Object to serialize
     * @return Serialized byte-array of the object
     */
    @Override
    public byte[] serialize(Object object) {
        return serializeJavaObject(object);
    }

    /**
     * @param bytes Serialized byte-array
     * @param dataType Enum type of the object
     * @param <T> Type of the object
     * @return De-serialized object
     */
    @Override
    public <T extends Serializable> T deserialize(byte[] bytes, DataType dataType) {
        return deserializeJavaObject(bytes);
    }

    /**
     * Given an object, returns its enum {@link com.linkedin.pinot.common.utils.DataTableSerDe.DataType}
     * @param object Object for which to get the data type.
     * @return DataType of the object.
     */
    @Override
    public DataType getObjectType(Object object) {
        return DataType.Object;
    }

    /**
     * Helper method to serialize an object using Java ser/de.
     *
     * @param object  to serialize
     * @return Serialized byte[] for the object.
     */
    public static byte[] serializeJavaObject(@Nonnull Object object) {
        byte[] bytes;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutput out = null;

        try {
            try {
                out = new ObjectOutputStream(bos);
                out.writeObject(object);
            } catch (IOException e) {
                LOGGER.error("Caught exception while serializing object for data table.", e);
                Utils.rethrowException(e);
            }

            bytes = bos.toByteArray();
        } finally {
            IOUtils.closeQuietly((Closeable) out);
            IOUtils.closeQuietly(bos);
        }

        return bytes;
    }

    /**
     * Helper method to de-serialize an object using Java ser/de.
     * @param bytes Java serialized byte-array of the object.
     * @param <T> Type of the object
     * @return De-serialized object
     */
    @SuppressWarnings("unchecked")
    public static <T extends Serializable> T deserializeJavaObject(@Nonnull byte[] bytes) {

        final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
        ObjectInputStream objectInputStream = null;
        Object readObject;

        try {
            try {
                objectInputStream = new ObjectInputStream(byteArrayInputStream);
                readObject = objectInputStream.readObject();
            } catch (final Exception e) {
                throw new RuntimeException("Caught exception while deserializing DataTable: " + e);
            }
        } finally {
            IOUtils.closeQuietly(objectInputStream);
            IOUtils.closeQuietly(byteArrayInputStream);
        }

        return (T) readObject;
    }
}